This is a fabulous article from from First Monday. Why shouldn't we assume that all consumers (if you're a business) or parents and children (if you're interested in education and other community-based communication) at least *want* to have internet access?
Pew Internet Life statistics (Fox, 2005) show that the percent of “truly disconnected” Americans has remained stable since 2002 at just over 20 percent.
Unpacking "I Don't Want It" -- why novices and non-users don't use the Internet, by R. Michelle Green. http://www.firstmonday.org